Information in differential line drivers is transmitted using two opposite signals. They send the same electrical signal as two unlike signals, each on a conductor of its own. The conductors can either be a track on a circuit board or wires that are paired together. 

HD29051is a differential line driver/ receiver with three state output design. Each device has two drivers/ receivers in a sixteen pin package

Features of HD29051FP

  • Built in current limit for short circuit
  • Power up/ down protection
  • High output current
  • Input hysteresis
  • In phase input voltage 

Replacement Part

SN7534050, SN7534051

Pictorial View

Pictorial view of UTSource HD29051FPis shown below, it is available in sixteen pin FP-16DA package

HD29051FP

Pin Description

Pin description and pin diagram of HD29051FP is given below

Pin Number 

Pin Name

Description

1

R1B

1st Schmitt trigger inverting input 

2

R1A

1st Schmitt trigger non inverting input

3

R1Y

1st Schmitt trigger output

4

D1 ENABLE

Data enable first channel

5

R2Y

Output of 2nd Schmitt trigger

6

R2A

2nd Schmitt trigger non inverting input

7

R2B

2nd Schmitt trigger inverting input

8

GND

Ground 

9

D2A

Data input second channel

10

D2Y

Output Y

11

D2Z

Output Z

12

D2 ENABLE

Data enable second channel

13

D1Z

Output Z

14

D1Y

Output Y

15

D1A

Data input first channel

16

VCC

Power supply

IC Electrical Characteristics/ Specifications

Some Electrical characteristic of HD29051FP are given below

Parameter 

Description 

Value

VCC

Supply voltage

7 V

VIN

Input voltage A, B

± 25 V

VID

Differential input voltage

± 25 V

IO

Output current

50 mA

VIE

Enable input voltage

5.5 V

VIN

Input voltage

5.5 V

VO

Output applied voltage

-1 to 7 V

TOPR

Operating temperature range

0 to 70 V

TSTG

Storage temperature

-65 to 150 C

Working Principle

Differential signaling is a method for electrically transmitting data using two opposite signals. In this technique the same electrical signal is sent as a differential pair signal.  the receiver circuit responds to the difference between two electrical signals. This technique affects the performance of the circuit against the electromagnetic noise.

Applications 

Differential line driver/ receiver can be used in following applications

  • Balanced audio circuits
  • Digital signaling 

Noise Cancellation using Differential Receiver in Digital Circuits 

A diagram of a representative circuit for differential receivers is shown. Not here due to differential input, input pulse is received with high amplitude and noise is cancelled due to differential effect.

Signal Transmission

Differential line driver/ receiver is used in signal transmission is shown in the circuit below.